Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 701 · 40 questions

The method (Round, then calculate): Round each number to the nearest ten, hundred or whole number. Do the easy sum with the rounded numbers. Pick the option nearest to it. To round a number, look at the digit after the place you keep: 5 or more goes up, less than 5 stays.

1. 1.Which is closest to 802 + 804 + 100? (a) 1600 (b) 1900 (c) 1700 (d) 1800
2. 2.Which is closest to 696 × 61? (Round each number first.) (a) 84000 (b) 420000 (c) 4200 (d) 42000
3. 3.Which is closest to 297 × 32? (Round each number first.) (a) 90000 (b) 900 (c) 9000 (d) 18000
4. 4.Which is closest to 598 × 28? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
5. 5.Which is closest to 805 + 805 + 697? (a) 2300 (b) 2200 (c) 2500 (d) 2400
6. 6.Which is closest to 598 × 29? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
7. 7.Round 39.29 to one decimal place. =
8. 8.Round 12208 to the nearest thousand.
9. 9.Which is closest to 296 × 70? (Round each number first.) (a) 42000 (b) 2100 (c) 21000 (d) 210000
10. 10.Round 44496 to the nearest thousand.
11. 11.Round 19.41 to one decimal place. =
12. 12.Round 95.88 to one decimal place. =
13. 13.Which is closest to 597 × 38? (Round each number first.) (a) 48000 (b) 240000 (c) 24000 (d) 2400
14. 14.Round 44.14 to one decimal place. =
15. 15.Round 85.68 to one decimal place. =
16. 16.Which is closest to 400 × 31? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
17. 17.Round 81.68 to one decimal place. =
18. 18.Which is closest to 504 × 58? (Round each number first.) (a) 30000 (b) 3000 (c) 60000 (d) 300000
19. 19.Round 71.34 to one decimal place. =
20. 20.Which is closest to 305 + 604 + 897? (a) 1900 (b) 1700 (c) 1800 (d) 2000
21. 21.Round 11598 to the nearest ten.
22. 22.Which is closest to 601 × 49? (Round each number first.) (a) 60000 (b) 30000 (c) 300000 (d) 3000
23. 23.Round 29435 to the nearest hundred.
24. 24.Which is closest to 700 × 49? (Round each number first.) (a) 350000 (b) 70000 (c) 35000 (d) 3500
25. 25.Which is closest to 2091 ÷ 31? (a) 700 (b) 140 (c) 35 (d) 70
26. 26.Which is closest to 596 ÷ 21? (a) 60 (b) 30 (c) 15 (d) 300
27. 27.Which is closest to 994 ÷ 49? (a) 20 (b) 10 (c) 200 (d) 40
28. 28.Which is closest to 502 × 71? (Round each number first.) (a) 70000 (b) 350000 (c) 3500 (d) 35000
29. 29.Which is closest to 397 × 89? (Round each number first.) (a) 36000 (b) 3600 (c) 72000 (d) 360000
30. 30.Which is closest to 702 × 28? (Round each number first.) (a) 2100 (b) 210000 (c) 21000 (d) 42000
31. 31.Round 39.19 to one decimal place. =
32. 32.Which is closest to 300 + 496 + 899? (a) 1900 (b) 1800 (c) 1600 (d) 1700
33. 33.Which is closest to 402 × 50? (Round each number first.) (a) 2000 (b) 40000 (c) 20000 (d) 200000
34. 34.Which is closest to 400 × 42? (Round each number first.) (a) 16000 (b) 160000 (c) 1600 (d) 32000
35. 35.Which is closest to 302 × 32? (Round each number first.) (a) 18000 (b) 9000 (c) 900 (d) 90000
36. 36.Round 71.19 to one decimal place. =
37. 37.Round 41763 to the nearest ten.
38. 38.Which is closest to 800 × 58? (Round each number first.) (a) 480000 (b) 48000 (c) 96000 (d) 4800
39. 39.Which is closest to 595 + 204 + 500? (a) 1200 (b) 1500 (c) 1400 (d) 1300
40. 40.Which is closest to 204 × 32? (Round each number first.) (a) 6000 (b) 600 (c) 12000 (d) 60000

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